Computing-machine.



No. 789,408. PATENTED MAY 9, 1905.

- F. M. CARROLL.

COMPUTING MACHINE.

APPLIOATION FILED MAR.1B,1901.

- 17 SHEETSPSHEET 1.

No. 789,408. I PATENTED MAY 9,1905. F. M. CARROLL.

COMPUTING MACHINE.

APPLIOATION FILED MAR.18,1901.

1'7 SHEETS-SHEET 2.

PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

17 SHEETS-SHEET 3.

PATENTED MAY 9, 1905.

P. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

1'] SHEETS-SHEET 4.

m3 viii 3 PATENTED MAY 9, 1905.

P. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

17 SHEETS-SHEET 5.

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F. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

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F. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAB.18,1901.

17 SHEETS-SHEET '7.

PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE.

APPLIOATION FILED MAR. 18,1901.

17 SHEETS-SHEET 8.

fave/275x I 522 3 M m PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE. APPLIOATION FILED-MAR. 18,1901.

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PATENTED MAY 9, 1905.

P. M. CARROLL.

COMPUTING MACHINE.

APPLIOATION FILED MAB.1'8,1901.

17 SHEETS-SHEET 10.

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P. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

1'! SHEETS-SHBET 11.

No. 789,408. PATENTED MAY 9, 1905. P. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE.

APPLIOATION FILED MAR. 18,1301.

l7 SHEETS-SHEET 13.

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PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

17 SHEETS-BRIGHT 14.

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PATENTED MAY 9, 1905.

P. M. CARROLL.

COMPUTING MACHINE.

AIPPLIOATION FILED MAE.1B,1901.

17 SHEETS-SHEET 15.

PATENTED MAY 9, 1905.

F. M. CARROLL.

COMPUTING MACHINE.

APPLICATION FILED MAR.18,1901.

17 SHEETS-SHEET 1 6.

PATENTED MAY 9, 1905.

P. M, CARROLL.

v COMPUTING MACHINE.

APPLICATION FILED MAR. 18,1901.

17 SHEETS-SHEET 17.

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UNITED STATES Patented May 9, 1905.

PATENT OFFICE.

FRED MERCHANT CAR-ROLL, OF NEWV HAVEN, CONNECTICUT, ASSIGNOR TO EDXVARD S. SlVIFT, TRUSTEE, OF NEl/V HAVEN, CONNECTICUT.

COMPUTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 789,408, dated May 9, 1905.

Application filed Marcll 18,1901. Serial No. 51.765.

To all 1.0700711 it may concern:

Be it known that I, FRED MERCHANT CAR- ROLL, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Computing-Machines; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and ex- IO act description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a view in front elevation of a computingmachine constructed in accordance I 5 with my invention, the case being removed and the upper portion of the sight-plate being broken away; Fig. 1, a broken plan view of the machine; Fig. 2, a view of the machine in side elevation, taken from the right-hand side thereof with some of the number-keys broken away; Fig. 2", a broken perspective detail view showing the connection of the totalprinting key with the printing mechanism; Fig. 2", a broken detail view, in side elevation,

showing the safety-stop of the total-printing mechanism; Fig. 2, a detail view, in side elevation, of the thumb-lever constituting an automatic stop for the operating-handle, which is shown by broken lines; Fig. 3, a view of 0 the machine in side elevation from the lefthand side thereof with portions of its printing mechanism broken away as well as the rear end of the frame of the machine; Fig. 4, a broken perspective view showing the means employed for cutting in and cutting out the printing mechanism; Fig. L, a detail view, in inside elevation, of the fixed disk, the cam-like driving-head, the coupling-pawl, and the pawl-operating cam of the mechanism shown 4c in the preceding figure. Fig. 4" is an enlarged broken view, in front elevation, of the tallywheels of the computing mechanism; Fig. 4, a detail view, in inside elevation, of one of the tally-wheels, showing its stop-pins, its springdetent, and the pawl, which, according to its position, operates all of the wheels; Fig. 4:, a detail view, in outside elevation, of one of the tally-wheels, showing the resetting-pawl in the groove on the shaft upon which the talley-wheels are mounted; Fig. 5. a view of 5 the machine in vertical longitudinal section on the line (4 def Fig. 1, with a portion of the keys broken away and showing the case of the machine which is not shown in any other figure of the drawings; Fig. 5, a detached perspective view of one of the pivotal sliding rack-bar stop members; Fig. 5, a broken sectional view of a portion of the locking mechanism of the item-wheels with the locking-bar thereof in its locked position; Fig. 6, a view of the machine, partly in plan and partly in horizontal section, on the line 0 (Z of Fig. 5; Fig. 7, a perspective view showing the prin cipal elements of the selecting mechanism of the machine; Fig. 7, a detail view, in side elevation, showing one pair of the dogs interposed between the selecting-drum and the normally stationary column-indicating d rum; Fig. 7, a detail view showing the dog coacting with the selecting-drum in date-printing and controlled by the date-printing handle; Fig. 7, a view in front elevation of the sightplate, which is broken away to show the itemwheels, the normally stationary column-indicating drum, and the traveling columnindieating drum, which indicates the progress of the colnputatnjm; Fig. 7", a detached front view of the sight-plate; Fig. 8, a broken detail view, partly in side elevation and partly in vertical section,showing the main features of the mechanism employed for operating the item-wheels. Fig. 8, a less comprehensive broken detail view showing the item-wheel yoke swung into its upper position to bring the item-wheels into operative engagement with the totalizingwheels; Fig. 8, a detached perspective view of one of the item-wheels, with particular reference to showing its locking-teeth; Fig. 8, a broken perspective view of the item-wheellocking bar; Fig. 8", a broken detail view, in 9 outside elevation, showing in their normal and locked positions the two mutilated drivingwheels employed for driving the item-wheels; Fig. 8, a detached plan view of the composite driving-wheel of the two wheels shown in the preceding figure; Fig. 8, a detail view, in side elevation, of the hub and arm through the medium of which the item-wheel-unlocking hook is operated by the unlocking-cam; Fig. 8', a detail view, in side elevation, showing the unlocking-cam in its normal position when it is moved from, which it permits the item-wheelunlocking hook to move so as to release the locking-bar and allow the locking-spring to act in moving the said bar into its locking position; Fig. 8 a plan view of the same parts with the exception of the cam; Fig. 9, a detached plan View of the item-wheels and the item-wheel yoke, showing the provision for the longitudinal movement of the yoke for the purpose of changing the relationsof the item-wheels to the totalizing-wheels and also showing parts of the means employed for reversing the rotation of the tens-carrying shaft, as required for shifting from addition to subtraction, and vice versa; Fig. 9*, a broken plan view showing the two item-wheel yoke-lifting cams and the tens-carrying shaft driving and reversing pinions, as well as the other cams and the gears on the main shaft; Fig. 9", a broken detail view, in side elevation, of the tens-carrying driving and reversing pinions, showing their relation to the mutilated gearwheel on the main shaft which drives them; Fig. 9, a broken sectional view on the line cf of Fig. 9, showing the movable tens-carrying pinion intermeshed with the main driving-pinion, which directly effects the rotation of the tens-carrying shaft when the machine is adjusted for subtraction and also showing the connection of the shipper upon the shipper-rod with the movable reversing-pinion, and the lug formed integral with the lifting-arm coacting with the two lifting-cams which control the position of the item-wheel yoke; Fig. 9, a detail plan view showing the movable tens-carrying pinion intermeshed with the intermediate pinion, which effects the rotation of the tens-carrying shaft when the machine is adjusted for addition; Fig. 9, a detached detail view; partly in plan and partly in section, of the devices employed for shifting the item-wheel yoke laterally, as required for multiplying and dividing; Fig. 10, a broken view in perspective of the mechanism employed for locking and unlocking the tens-carrying wheels by power transmitted from the operating-handle of the machine and also showing one of the triggers used to support the pivotal carriers of the locking-dogs of the said wheels; Fig. 11, a broken view, partly in side elevation and partly in vertical section, showing the connection of one of the key-levers with the rocking d rivingframe and the rocking stop-frame which control the action of the sliding rack-bars through the medium of the pivotal stop member; Fig. 12, a similar view showing the positions of the parts when the depression of the key has swung the stopframe to release the sliding rack-bar. In this figure the stop member is shown in its highest position, in which it will be lifted only when the number-key 9 is operated; Fig.

rier by a trigger.

13, a broken perspective view of the left-hand end of the rocking driving-frame looking from the right-hand side thereof; Fig. let, a detached perspective view of the composite totalizing-wheels mounted upon the totalizing-wheel shaft, and showing also the telltale, which visually indicates whether the machine is set for addition or subtraction; Fig. 15, a view showing in perspective the three members of each of the totalizingwheels-namely, the chambered number-disk, which is loosely mounted on the shaft, the washer-like hook, which is fixed on the shaft, and the gear member, which is loosely mounted. on the shaft and provided with pins which enter the flange of the chambered numberdisk and couple the disk andv wheel together; Fig. 16, a broken plan view showing the composite tens-carrying wheels. the locking-dogs thereof, and the pivotal carriers upon which the said dogs are pivotally mounted. This view also shows one of the spring-detents with which each of these wheels is provided, the other detents having been removed for clearness; Fig. 17, a broken detail view, partly in side elevation and partly in vertical section, showing one of the pivotal lockingdog carriers in its released position in which the locking-dog carried by it is engaged with the pinion of one of the composite tens-carrying wheels; Fig. 18, a similar view showing the locking-dog held in its retracted position by the engagement of its pivotal car- 'lhis view also shows by broken lines a secondary position of the parts, illustrating how the lockii'lg-dog is still held in its retracted position after the trigger has been disengaged from the pivotal carrier by means of a wing depending from a rock-shaft and engaging with the upper end of the carrier; Fig. 19, a detached perspective view of one of the locking-dogs and its coacting ram; Fig. 20, a detached view of the ram-spring; Fig. 21, a detached perspective view of one of the pivotal locking-dog carriers; Fig. 22, a perspective view showing the two members of one of the tens-carrying wheels namely, the hub and pinion thereof; Fig. 23, a view comprising the hubs of all of the tens-carrying wheels and designed with particular reference to showing their differentiation in the matter of the location upon them of their opcratingteeth; 1*ig.2 L,adetail view, partly in side elevation and partly in vertical section, of the means employed for resetting the sliding rack-bars and also for repeating without the manipulation of the several keys of a line of figures already set up on the totalizing-wheels. This view also shows the means employed to prevent the use of the repeating-function of the device when item-wheels are adjusted for multiplication or division; Fig. 25, a detail view showing the pivotal resetting-hook and the fixed resetting hook in their normal positions by full lines and in their operated positions by broken lines. This figure also shows the repeatingpin in its retired or inoperative position; Fig. 26, a corresponding but less comprehensive view showing the repeating-pin in its operative'position in which it holds the pivotal resetting-hook out of engagement with the fixed resetting-hook secured to the resetting rock-shaft; Fig. 27, a detail broken plan view of the parts shown in Figs. 25 and 26; Fig. 28, a detached partial plan view of the printing mechanism, with particular reference to showing the means employed for printing ciphers to the right of any digit and to omitting to print ciphers to the left of any digit. This view also shows the devices used to cut out of action the date-printing hammers; Fig. 28, a broken detail plan view designed to show the resetting of the printing-hammers; Fig. 29, a view in front elevation of the parts shown in Fig. 8, but somewhat less comprehensive than the same; Fig. 29, a view in vertical section on the line 00 7 of Fig. 29, looking outward and showing the slotted collar 412; Fig. 30, a view comprising perspective representations of the two members of each of the printing-wheels-namely, the type member and the pinion member; Fig. 31, a detail view in side elevation, showing the dog carried by the type member of one of the printing-wheels in engagement with one of the lugs of the pinion member thereof, as occurs in printing totals; Fig. 32, a detail view in side elevation, showing part of the means employed for feeding the paper; Fig. 33, a view in rear elevation of the said mechanism; Fig. 34:, a detail view, in side elevation, of the telltale and the mechanism for the operation thereof from the shipper-rod, which is operated to set the machine for addition or subtraction; Fig. 34, a detail plan view showing the means employed for limiting the rotation of the shipper-rod; Fig. 34:", a view thereof partly in outside elevation and partly in vertical section; Fig. 35, a detail plan view showing the devices employed for feeding the inking-ribbon in either direction; Fig. 36, a detail view, in side elevation, from the left-hand side of the machine, showing details of the ribbon-reversing mechanism; Fig. 37, a similar but less comprehensive view of the same parts, showing the disengagement of the pawl from the ratchet-wheel of the left-hand ribbon-spool by means of the pivotal switch-arm, which is moved by the ribbon itself; Fig. 38, a view in elevation of the right-hand ribbon-spool, together with its coacting reversing devices, the operation of which is concurrent with but opposite to the reversing devices coacting with the left-hand ribbon-spool; Fig. 39, a detached perspective View of the normally stationary columnindicating drum; Fig. 40, a developed surface of the said drum, showing the arrange ment of its locating spots and notches; Fig. ll, a detached perspective view of the travcling column-indicating drum; Fig. 42, a developed surface of the said drum, showing the arrangement of its locating-spots; Fig. 43, a broken detail view, partly in elevation and partly in section, showing the right-hand drum-setting key; Fig. 44, a broken detail view, in inside elevation, showing the connection with the drum of the left-hand drum-setting key.

My invention relates to an improved computing and printing machine, the object being to produce a machine constructed with particular reference to compactness, to ease, rapidity, and accuracy of performance, to simplicity of comprehension as to its mode of manipulation, and to the visual indication of the progress of each computation, so as to guide its user step by step and relieve his memory of the burden of carrying figures.

A further object of my invention is to provide such a machine with a printing mechanism adapted to be cut into or cut out of operation at will and when out into operation to print items and totals and to date them.

\Vith these ends in view my invention consists in a computing-machine having certain details of construction and combinations of parts, as will be hereinafter described, and particularly recited in the claims.

As herein shown, the machine is designed to be used for adding, subtracting, multiplying, and dividing, printingitems, printing totals, and printing dates. In describing the machine and its operation I shall consider the mechanisms for performing these functions in the order in which they are above given. I. may, however, state here that for use in certain situations the machine may be simplified by leaving out its printing mechanism. it may also be simplilied by omitting the features which provide for subtracting, multiplying, and dividing, though it is probable that any form that the machine may assume will be adapted for subtraction as well as addition, which is the main purpose for which computing-machines are used and upon the principle of which they all rest.

In the drawings many duplicate parts have been omitted for the sake of clearness.

As shown, the machine is provided with a series of eight item-wheels 2, Figs. 8" and 9, mounted so as to turn independently of each other upon a horizontal item-wheel shaft 3, the ends of which are journaled in the respective arms L and 5 of a vertically-swinging and laterally-movable item-wheel yoke or cradle 6, Fig. 9, one end of which receives and turns and slides upon a shaft 7, journaled in the frame-piece 9 of the machine. The other end of the said yoke 7 receives a shaft 290, which is rigidly secured to it and which is actuated in rocking and sliding movement for imparting corresponding movement to the yoke, as will be described later on.

Each item-wheel 2 is provided upon its pc- 

